Paul schwenke



l(No Model.)

P. SGHWENKE. ELECTRICAL LOCK.

N0. 409,508. Patented Aug. 20, 1889.

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UNTTED i STATES nTnNT OFFICE.

PAUL SCHWTENKE, OF ZERBST, ANHALT, GERMANY.

ELECTRICAL LOCK.

SPECIFICATION forming part of Letters Patent No. 409,508, dated August 20, 1889.

Application filed November 16, 1888. Serial No;29l,072. (No model.) Patented in Germany August 18, 1887, No. Ll8,050; in

France October 3, 1887, No. 186,184, and in Austria-Hungary February 26, 1888, Nol 88,543.

To a/ZZ whom it may concern:

Be it known that I, PAUL SCHWENKE, a subject of the Duke ot Anhalt, residing at Zerbst, in the Dukedom of Anhalt, German Fmpire, have invented certain new and useful Improvement-s' in Electrical Locks, (for which I have obtained Letters Patent in Germany on the 18th day of August, 1887, numbered 48,050 in Austria-lflungary on the 26th day of February, 1888, numbered 88,543, and in France on the 3d day of October, 1887, n umbered 18(3,18l,) of which the following is a specification, reference being had therein to the accompanying drawings.

The invent-ion relates to improvements in electrical locks; and it consists in the construction and novel combination of parts, hereinafter described, illustrated in the drawings, and pointed out in the claim.

The object of the invention is to produce a lock that may be operated from a distance by an electric circuit, the closure of which may be effected at any time by a circuit-closer ot ordinary construction.

In the accompanying drawings, Figure 1 represents a front view of a lock embodying the invention, the front plate being removed and the bolt locked. Fig. 2 represents the lock, being a similar view with the bolt released. Fig. 3 represents the lock applied to a door and the circuit and battery attached thereto. Fig. et is an end elevation of the lock.

Referring to the drawings by letter, A designates a rectangular bolt mounted on the arbor or short shaft B, j ournaled at its ends in the front and back plates of the lock-casing, and provided with an angular bore, as shown, by means of which and a key Iitting in said bore the bolt may be turned up to lock. The bolt has the triangular proj ect-ion a. on its upper outer corner, when turned up, and the triangular locking-notch a similarly on its upper inner corner.

F F are electric magnets secured within the top of the back casin g, and E is an arma-ture below said magnets with its heel pivoted at c within the casing on the opposite side from the bolt. The said armature is a catch or detent, and has a hoolcpoint c', that enters the notch d. and holds the bolt up.

C is a spring secured to ablock C', secured within the lock-casing, which spring bears against the adjacent free edge of the bolt and holds the shoulders ot the notch d and point e closely together, so that the bolt cannot rattle.

D is a pivoted detent-hook pressed upward by the free end of the spring d, attached to a block secured within the casing at the lower rpart thereof, and d is a stop-block to prevent said detent-hook from rising too far. The upwardly-standing point (Z2 of said detent catches under the triangular projection a of the bolt, when the latter is down, and steadies it. The detent, however, on account of the incline of the projection cl2, when turned up by a suitable key, releases the projection a and permits the bolt to rise.

In Fig. 3 a circuit X, inclosing a battery, is shown connected to a lock secured to a door 05, the said circuit being normally open and provided with a circuit-closer c, of common construction, at a suit-able point.

It is evident from the above that when the circuit X, which embraces the magnets F, is closed the magnets will attract and draw up the armature, releasing the bolt, which will fall by gravity, the point a engaging the de tent D and steadying the bolt.

To lock the bolt, when the circuit is again open, the bolt is turned up till the point e engages in the notch a. The circuit X is composed ot` the wires fr co2, which extend between the circuit and the lock. The Wire oc passes from the circuit-closer to the top of the lock, enters therein to a screw-block w3, which must be insulated, and thence to the nearest magnet F. The wire c2 also passes in the top of the lock to a similar screwblock C', to which the spring C is secured, the current thence passing through the lockplate to the screw-block a, and thence to the opposite magnet F.

Having described my invention, I claim- The combination, with the circuit X, comn posed of the wires a" rhavinga suitable cir cuit-closer at a proper point, and the electromagnets F in said circuit, the wires Q02 extending from the circuit-closer to the top of the lock, passing therein and connecting with IOO the opposite magnets F, in the manner substantially as described, of the look, comprising the shaft B, journaied in the front and rear pla-tes of the back casing and having an angular bore for the purpose of being turned up by a key fitting in said bore, the rectangular C ravity-bo1t A, mounted on said shaft and provided with the projection d and notch d', the armature E, pivoted within the casing at e, below the magnets F, and provided with the point e to engage the notch d', the springs C d, and the pivoted detent D, 2LH constructed and arranged substantially as and for the purpose specified.

In testimony whereof I have hereunto set 15 my signature in presence of two Witnesses. PAUL SCHWENKE. Titnessesz B. Rol, W. KEUFFEL. 

